Use of a liquid membrane for scale removal

Details Use of a liquid membrane for scale removal Use of a liquid membrane for scale removal

1985-08-30

1986-11-11

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

252 8552, E21B 3700, E21B 3708

Patent

active

046216944

ABSTRACT:
A method for removing scale-forming ions from oil and gas production equipment. An external aqueous phase of a liquid membrane system contacts said scale and solubilizes said scale-forming compounds. Scale forming ionic compounds are then transferred into an immiscible liquid hydrocarbonaceous membrane phase having a complexing agent for scale forming ions. Said hydrocarbonaceous membrane phase envelops droplets of an internal aqueous phase which has a stronger complexing agent for scale forming ions than is contained in said hydrocarbonaceous membrane phase. Scale forming ions are transferred from said hydrocarbonaceous membrane phase and are accumulated and concentrated in said internal aqueous phase. Films of scale are thus progressively removed from surfaces where they have deposited.

REFERENCES:
patent: 3951827 (1976-04-01), Burroughs et al.
patent: 4030548 (1977-06-01), Richardson et al.

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